Johnson Controls hc8 - Manual
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Johnson Controls Unitary Products
035-22286-001-A-0909
REPAIR PART INSTALLATION MANUAL
HEAT PUMP COMMUNICATING CONTROL REPAIR KIT (S1-33102957000)
MODELS YZB, YZE, YZH, HL5, HC5, HL8, HC8
GENERAL INFORMATION
The YorkGuard VI Demand Defrost control as a replacement
part for prior versions of the YorkGuard control.
NOTE:
For direct replacement of YorkGuard VI, replace the
control only.
Service replacement kit consists of:
• YorkGuard “VI” Defrost Control.
CONTROL CONFIGURATION FOR
ALL APPLICATIONS
Most jumper settings should be set to match jumpers on board
being removed.
Remove control from packaging and configure the control as
follows:
1.
Specify the desired Low Temperature Cut Out (LTCO)
using the jumper on the control.
2.
Specify the desired Balance Point (BP) using the jumper on
the control.
3.
Specify appropriate defrost curve using the jumper on the
control. See Table 1.
4.
Verify that the Y2 LOCK jumper is set. This jumper is not
applicable to a single stage compressor system.
5.
Specify if the Heat Pump is installed with a fossil fuel fur-
nace using the FFUEL jumper. The jumper should be ON
for a fossil fuel furnace installation and OFF for an air han-
dler installation.
6.
Specify Switch Point jumper using the jumper on the con-
trol.
7.
Verify that the HOT HEAT PUMP is set appropriately.
8.
Specify compressor delay using jumper on the control.
“ON” will shut-off compressor when entering and leaving
defrost.
FIGURE 1:
Demand Defrost Control Module
Following the detailed instructions for modifications of both
the indoor and outdoor units is critical.
TABLE 1:
Defrost Initiate Curves
Defrost Curve
Selection
Jumper Position
1
2
3
4
YZB/HC3B/HL3B 2 & 2.5 Ton 4 & 5 Ton 3 & 3.5 Ton 1.5 Ton
YZE/HC5B/HL5B
2 Ton
4 & 5 Ton
3 Ton
N/A
YZE03811
N/A
N/A
3 Ton
N/A
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